Yes, but it doesn't provide the new graphics modes that Jen's device does.
Yeah, with the A3000 being ECS, and the Inidivision ECS providing dual screens, I'd say that easily trumps the built-in Amber.
It really depends on what you want to do with your amiga. I had both cv64 and cvppc in the 90s and i never ran out of video memory. Maybe os 4.1 needs more, no clue about that, but with 3.1 and probably 3.5 and 3.9 there is no prob. But 1500 is overpriced for a desktop 060 4000.
My Picasso IV is 4MB, and I'm using my Workbench at 1152x864 at 24-bit color. So that 4MB works fine for me. Were I using a PCI board I would definitely go for more so I could push widescreen or at least 1600x1200 24-bit.